Impaling pin cam and roll



Dec. 1, 1931. I H. A. w. WOOD IMPALING PIN CAM AND ROLL wyA .we. Wan? Original Filed Dec. 18. 1928 Patented Dec. 1, 1931 HENRY A. WISE WOOD, OF NEW YORK,

my; ramme TO, wool) NEWSPAPER MACHINERY CORPORATION, OF NEW YORK, 'N. Y., A COR PORAT-ION -OF VIRGINIA IMPALING PIN when; f

Application filed December 18, 1928, Serial 111 0. 326,362. nenie a'na s, 1931.

This invention relates to a roller cam for a folding couple of a printing press.

The principal object of the invention is to provide means whereby the roller which operates in the cam groove will not leave a surface and come into engagement with an opposite surface, the cam roller still rotating, thus preventing the grinding and wear on the cam path due to that cause and the consequent misshaping of the cam groove; also to provide an improved cam roller for this purpose.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in which Fig. 1 is an end view of the cam of a folding cylinder, with the pin-operating mechanism shown thereon, constructed in accordance with this invention, and

Fig. 2 is a sectional view on the line 22 of Fi 1.

In ordinary practice the cam roller sometimes bears against the outer edge and sometimes against the inner edge of the cam groove on either of the cylinders of a fold ing couple. This is due to the alternate pressures to which the roller is generally subjected and causes the roller to rotate part of the time in one direction and part of the time in the other. When the cam roll leaves one surface on which it has been running and which has been moving it bodily and enges with an opposite surface which may be shaped so as to cause the cam roll to move bodily in another direction it will leave the roll spinning and therefore when it engages the second surface as stated, it will grind or rub against the same until its cen trifugal force has been overcome by friction and its direction of rotation, of course, reversed. This results in a good deal of wear on the cam path and this wear occurs at the same point time after time so that the cam gradually gets worn out of shape, and also there is a good deal of wear on the surface of the roll.

For the purpose of overcoming these difficulties, I provide the stationary cam 10 for the folding cylinder, or the cutting cylinder, with a double cam path or groove. This involves' an outside surface 11 and an inside surface 12 on the opposite-side and in' different-planes perpendicular to the axis of the cylinder; I also use the ordinary crank 13 on thecylinder 17 for operating the impaling pins .l tbut having two rolls thereon 15 and 16. 1 .Theseftwo rolls are of the same size and each is freely rotatable on the axis of the crank arm. One of them engages the surface 11 and the other engages the surface 12. These two surfaces .11 a'nd12 are also a distance apart substantially equal to the diameter of each of these rolls. Each roll always engages its own surface and it never rotates except in one direction, and all chance of the roll spinning and then engaging the opposite surface of the cam groove and grinding the same is avoided, because the two cam grooves are out out on the sides opposite 11 and 12 respectively, so that if this spinning occurs it ocfizurs in the air. Therefore, each roll rotates in one direction only and they are not caused to change their direction of rotation, which results in avoiding the grinding and wearing effect to which I have referred.

Although I have illustrated and described only one form of the invention I am aware of the fact that changes can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore, I do not wish to be limited to the exact form shown, but what I do claim is:

1. The combination with one of the cylinders of a folding couple and a pair of cam grooves, ofcam rollers, each one of which engages only one of the cam grooves, of an impaling pin crank connecting the cylinder and cam roller.

2. The combination with a cylinder of a folding couple, a cam having a double cam groove thereon, the two parts being in dif ferent planes, and a cam roll in two parts, both independently and concentrically mounted and each adapted to engage one of said parts of the cam groove, of an impaling pip1 crank connecting the cylinder and cam r0 3. The combination with one of the cylinders of a folding couple, of a stationary cam having a cam groove provided with an outer surface and an inner surface in different planes transverse to the axis of the cylinder,

and an impaling pin crank having two independent rolls of the same diameter and freely rotatable on the same axis, each roll being adapted toengage one only of said surfaces 4. The combination with one cylinder of a folding couple and a cam having a double cam groove, of a double cam roll therefor composed of two rollers of the same diameter and rotatable on the same axis, one of the cam grooves having its outer surface only in position to engage one of said rolls andits inner surface cut away so as not to be able to engage that roll, the other cam groove having only its inner surface in position to engage the opposite side of the other roll and its outer surface out of reach thereof, the outer surf-ace of the first cam groove and the inner surface of the secondcam groove being-spaced apart radially a distance equal tov the diameter of said rolls.

In testimony whereof I have hereunto affixed my signature.

' HENRY A. WISE WOOD. I 

